Patent US5279561A successfully refreshed from Google Patents.
US4013065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture dermatometer
Assignee: Wyeth Holdings LLC
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Filing: 1976-02-23
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Granted: 1977-03-22
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Expires: 1996-02-23
Abstract
Abstract A device to measure the moisture content of the stratum coreum of human skin by means of a stray field capacitor, including means to process, and display a quantitative reading from the stray field capacitor measurement.
Inventors
- 👤 Melvin Copeland
- 👤 William Peter Konazewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4869; A61B5/4875; A61B5/05; A61B5/053; A61B5/0531
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A device for measuring moisture in a moist substrate which comprises, a stray field capacitor for making contact with said substrate, means to provide an oscillating signal to said stray field capacitor, and means to detect and read a modified signal produced by said stray field capacitor in contact with said moist substrate, said stray field capacitor comprising yieldable means to urge it against the skin under pressure, said means further comprising means to trigger said read means at a predetermined pressure.
Claim 2
Independent Claim
82 words
A device for measuring moisture in a moist substrate which comprises, a stray field capacitor for making contact with said substrate, means to provide an oscillating signal to said stray field capacitor, and means to detect and read a modified signal produced by said stray field capacitor in contact with said moist substrate, said stray field capacitor comprising yieldable means to urge it against the skin under pressure, said means further comprising means to trigger said read means at a predetermined pressure.
Claim 3
Dependent Claim
32 words
A device as in claim 1 for measuring the moisture content of the stratum coreum of human skin wherein said stray field capacitor is adapted to make contact with the skin surface.
Claim 4
Dependent Claim
14 words
A device as in claim 2 wherein said read means is a digital voltmeter.
Claim 5
Dependent Claim
13 words
A device as in claim 2 wherein said read means is an ammeter.
Claim 6
Dependent Claim
18 words
A device as in claim 2 wherein said detecting means includes means to amplify said detected modified signal.
Claim 7
Dependent Claim
23 words
A device as in claim 5 comprising means to calibrate said signal to obtain predetermined readings for water and the absence of water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |